KR20140145557A - Mounting frame for an electrically driven motor vehicle - Google Patents

Abstract

The present invention relates to a mounting frame (20) for an electrically driven vehicle (10), the mounting frame (20) comprising a frame (20) oriented in the longitudinal direction (18) An electric drive unit 22 for driving an automobile 10 mounted on the longitudinal beams 30 and 32 and an electric drive unit 22 for driving the longitudinal beams 30 and 32, Rigid hollow body 28 formed separately from the mounting frame 20 and fixed to the mounting frame 20, the hollow body 28 being disposed between the longitudinal beams 20, 30, 32) to form a closed frame section.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mounting frame for an electric-

The present invention relates to a mounting frame for an electric powered vehicle, the mounting frame comprising two longitudinal beams oriented in the longitudinal direction of the motor vehicle and forming a frame device which opens outward in the longitudinal direction, An electric drive unit for driving the vehicle, and a flexural rigid hollow body formed separately from the longitudinal beams and fixed to the mounting frame.

This type of mounting frame generally serves to securely mount the driving parts of the electric drive vehicle to the chassis or support frame of the electric drive vehicle.

A mounting frame of this type is known, for example from US 2004/0090085 A1, in which the mounting frame comprises two parallel free longitudinal beams extending in the longitudinal direction of the motor vehicle, on which mounting cradles And an electrical control unit is mounted on top of the longitudinal beams within the mounting cradle. In the case of such a mounting frame, the mounting cradle for mounting of the electric control unit can absorb less strain energy at the time of the crash of the vehicle, so that the mounting cradle and the electric control unit do not generally increase the stability of the mounting frame, and does not contribute to passive safety.

In general, the known automotive support frames and mounting frames for electric vehicles generally have reduced stability of the vehicle support frame because there are no components of the internal combustion engine and / or transmission unit, and passive safety for the occupant There is a disadvantage that additional reinforcement means are required in order to ensure the safety.

Accordingly, it is an object of the present invention to provide a mounting frame for an electrically driven automobile which increases the passive safety of a passenger with a small technical cost.

This problem is solved by forming a closed frame section in which, in the case of the mounting frame mentioned at the outset, the hollow body is arranged between the longitudinal beams and mechanically fixedly connected to the longitudinal beams.

The problem is also solved by an electrically driven vehicle having a support frame and a mounting frame according to the invention, the mounting frame being arranged on a support frame of the motor vehicle and mechanically fixed to the support frame.

By forming a frame device in which the longitudinal beams open longitudinally towards the outside or towards one end of the vehicle, the mounting frame can be manufactured with little technical expense, and the hollow body and electric drive unit can be made of the two longitudinal beams The two components can generally serve to reinforce the mounting frame and the longitudinal beams and the hollow body and the electric drive unit form one block , The mechanical stiffness of the mounting frame generally increases. Since the electric drive unit and the hollow body form one stable unit together with the longitudinal beams, the mounting frame provides the passive safety and controlled deformation behavior necessary for crashes in electric powered vehicles without the solid components of the internal combustion engine drive train Can be guaranteed.

As a result, the object of the present invention is solved completely.

In one preferred embodiment, the hollow body is secured to the longitudinal beams by means of connecting means.

Thus, the mounting frame can be equipped with parts, in particular an electric drive unit, with little technical cost, and the reinforcement of the required mounting frame is achieved by subsequent fixing of the hollow body.

Also preferably, the hollow body and the drive unit are offset or juxtaposed to one another longitudinally on the longitudinal beams, wherein the hollow body is offset longitudinally toward the exterior or towards the one end section of the vehicle, Respectively.

In this manner, the closed frame section is formed around the electric drive unit, so that the electric drive unit is protected from being damaged in the event of a collision of the vehicle, thereby reducing the risk of overvoltage.

In addition, a battery for supplying electric energy to the electric drive unit is mounted to the longitudinal beams, and the hollow body is arranged so as to be offset with respect to the battery in the longitudinal direction.

In this way, the battery is mechanically protected in the event of a collision.

Also, preferably, reinforcing struts are formed in the hollow body to increase the mechanical stability of the hollow body in the longitudinal direction.

In this way, the mechanical stability of the hollow body can be increased without significantly increasing the weight of the vehicle.

Alternatively, the hollow body may be filled with a material having a good collision behavior and a low density, such as a honeycomb structure.

Also, preferably the reinforcing struts are initiated at the point of attachment where the hollow body is mounted to one of the longitudinal beams and extend radially or V-shaped into the hollow body.

In this manner, the collision energy can be dispersed by the fact that the corresponding collision energy at impact is effectively transmitted to the longitudinal beams through the reinforcing struts.

Further, preferably, an adaptation element is disposed between the hollow body and the electric drive unit.

In this way, strain energy can be exchanged between the hollow body and the electric drive unit upon impact, and block formation can be improved.

Also preferably, the adaptation element has a concave curved surface facing the drive unit.

In this way, improved mechanical contact between the adaptation element and the drive unit can be established, thereby improving block formation by the hollow body and the electric drive unit.

Further, preferably, the adaptation element is formed of plastic.

In this way, the strain energy can be effectively absorbed at the time of the collision of the vehicle, while the weight of the adaptation element is limited.

Also, preferably, the adaptation element is formed of a metal.

In this way, since additional block formation can be achieved, the passive safety is simultaneously increased due to the mass of the adaptive element.

Particularly preferably, the adaptation element has a honeycomb structure.

In this way, a low weight adaptive element of the metal material can be provided.

Further, preferably, the electric parts of the automobile are housed in the hollow body.

In this way, the structural space of the hollow body can be utilized, and the bending stiffness of the hollow body can be further increased.

Also preferably, the hollow body is in the form of a closed hollow body.

In this way, the mechanical stiffness of the hollow body can be increased, and the electric parts disposed in the hollow body according to circumstances can be completely enclosed and protected.

The features described above and in the following description, within the scope of the present invention, can be used not only in the respective specific combinations, but also in other combinations or alone.

Embodiments of the invention are shown in the drawings and will be described in more detail in the following description.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of an automobile having a mounting frame for mounting an electric drive machine;
2 is a schematic perspective view of a vehicle with a mounting frame for mounting electrical components.
Figures 3a and 3b are perspective views of a hollow body for forming a block with a mounting frame.

In Figure 1, an electrically driven vehicle is schematically illustrated and indicated generally at 10. The automobile (10) includes a support frame (12) on which the wheels (14) of the automobile (10) are mounted. The automobile 10 generally has a longitudinal axis 16 and moves longitudinally in a direction substantially parallel to the longitudinal axis 16, as indicated by the arrow 18.

In the support frame 12, a mounting frame 20 is fixed for mounting of electrically driven parts of the automobile 10 in general. An electric drive machine 22 is mounted on the mounting frame 20 and the shaft 24 of the electric drive machine 22 is connected to the wheels via a transmission 26 to drive the automobile 10. The mounting frame 20 is also equipped with a reinforcing element 28 in the form of a hollow body 28. In one particular embodiment, the electrical components of the electrically powered vehicle 10 are received within the hollow body 28 to mechanically reinforce the reinforcing element 28 and utilize the structural space located within the hollow body 28. The mounting frame 20 includes two elongate longitudinal beams 30,32 extending outwardly, i. E. Parallel to the longitudinal axis 16, toward one end section of the automobile 10. [ The longitudinal beams 30, 32 are mounted to the support frame 12 or transverse beam 34 of the vehicle. The longitudinal beams 30 and 32 form a frame device that opens outward in the longitudinal direction 18 and extends as one of the free beams toward one end of the vehicle 10 or the support frame 12 in parallel to the longitudinal axis 16 do. An electric drive machine (22) is mounted and mounted between the longitudinal beams (30, 32). The reinforcing element 28 is mounted on the two longitudinal beams 30 and 32 so as to be offset relative to the electric drive machine 22 and is secured to the longitudinal beams 30 and 32 by means of securing means, do. The reinforcing element 28 is mounted on the distal end 38 of each of the longitudinal beams 30,32 in the form of a rigid flexible rigid hollow body 28 and is attached to the distal ends 38 of the longitudinal beams 30,32, Are mechanically connected to each other. The reinforcing element 28 or the hollow body 28 forms a closed frame section with the free longitudinal beams 30 and 32 and the hollow body 28 has a plurality of longitudinal beams 30 and 32 for connecting the longitudinal beams 30 and 32 together A transverse strut is formed at the ends 38.

The mounting frame 20 is also equipped with a battery 40 or a battery 40 that can be electrically connected to the electric drive machine 22 for supplying electric energy to the electric drive machine 22. [ In this embodiment, the battery 40 is disposed between the electric drive machine 22 and the transverse beam 34.

The reinforcing element 28 is disposed or mounted so as to be offset outwardly in the longitudinal direction 18 with respect to the electric drive machine 22 and the battery 40 while the electric drive machine 22 and the battery 40 are arranged in the longitudinal direction 18 To be inwardly offset relative to the reinforcing element 28. As shown in Fig. In other words, the reinforcing element 28 is disposed in front of the electric drive machine 22 in the direction of impact of the vehicle. In this way, the longitudinal beams 30, 32 and the electric drive machine 22 and the reinforcing element 28 can generally form one block. The reinforcing element 28 is disposed or mounted externally to the electrical components in the longitudinal direction 18 to protect the electrical components in the event of a collision of the vehicle 10 and thus to avoid the risk of overvoltages do.

The reinforcing element 28 generally serves to stabilize the mounting frame 20 and replaces the parts of the automobile 10 lacking due to the electric drive so that the mounting frame 20 has the reinforcing elements 28 and Together with the electric drive machine 22, forms a solid block that provides the necessary stability and corresponding shock-absorbing zones in the event of a collision of the automobile 10. In this way, the support frame 12 and the mounting frame 20, which are designed for a motor vehicle with an internal combustion engine, can also be used for an electric drive vehicle, in which case the corresponding mount points of the internal combustion engine and the required transmission are electrically driven Is used for mounting of the machine 22 and the reinforcing element 28. Thus, for example, missing solid parts such as transmissions and engine blocks of an internal combustion engine drive train can generally be replaced by an electric drive machine and a reinforcement element 28.

The reinforcing element 28 is in the form of a hollow body 28 and preferably is provided with a charger or electric drive machine 28 for charging the battery 40 to increase the stability of the reinforcing element 28 and utilize the structural space, It is possible to accommodate an electric component such as a power electronic device of the power unit 22. Since electrical components usually include a solid metal cooler, the block formation and consequently the reinforcement of the mounting frame 20 can be further improved by placing electrical components in the hollow body 28 in this way.

In one alternative embodiment, the reinforcing element 28 or hollow body 28 includes a frame structure for enhancing the mechanical stability of the reinforcing element 28 therein. The frame structure is preferably mechanically connected to the securing means 36 or corresponding mount points to transfer the impinging energy from the reinforcing element 28 to the longitudinal beams 30,32 during a collision of the automobile 10.

The securing means 36 may be screws, rivets, or welding points for securing the reinforcing elements 28 to corresponding mounting points of the respective longitudinal beams 30,32. The hollow body 28 is preferably connected to the longitudinal beams 30, 32, respectively, in surface contact form through their respective sides.

The longitudinal beams 30,32 comprise a plurality of folding sections not shown in detail herein, which serve as set breaking points or folds of the longitudinal beams 30,32. In collision, the folding sections generally ensure a predefined flexural behavior of the mounting frame 20 so that controlled bending of the support frame parts is realized. In this way, the impact protection zone of the automobile 10 can generally be improved.

An adaptation element 42 is arranged between the reinforcement element 28 and the electric drive machine 22. The adaptation element 42 preferably supports the reinforcing element 28 and has a shape or contour corresponding to the surface of the electric drive machine 22 on the surface facing the electric drive machine 22, 10 and at the time of corresponding deformation of the mounting frame 20, stabilization of the entire mounting frame 20 and further block formation. To this end, the adaptation element 42 preferably has a flat face towards the reinforcing element 28 and a concave curved face towards the electric drive machine 22. [ The adaptation element 42 may be in contact with the electric drive machine 22 as well as the reinforcement element 28 in a surface contact manner.

The adaptation element 42 may be formed of, for example, a plastic element of a hard rubber material or a metal element of, for example, aluminum. Advantageously, the adaptive element 42 has a honeycomb structure, which provides low weight and high stability and therefore highly effective block formation.

2 is a perspective view of a vehicle 10 having a support frame 12. As shown in Fig. The same components are denoted by the same reference numerals, and only special features are described herein.

The longitudinal beams 30,32 extend parallel to the longitudinal axis 16 and are formed of elongate straight rods having a hollow rectangular profile to reduce weight. The electric drive machine 22 and the transmission 26 are mounted between the longitudinal beams 30,32. The longitudinal beams 30,32 are connected at the central section 46 by the transverse beam 50 to improve the mounting performance of the components and increase the stability in that area. The reinforcing element 28 is mounted on the distal ends 38 of the longitudinal beams 30 and 32 to form a closed frame section by mechanically securing the longitudinal beams 30 and 32 to each other, Will be described in more detail.

Each longitudinal section 54,56 of the support frame 12 is formed laterally adjacent to the longitudinal beams 30,32 and each of these longitudinal sections connects the bumper to the support frame 12 And has connection sections 58, 60 for connection.

The reinforcing element 28 is disposed between the distal ends 38 of the longitudinal beams 30,32 and is fixedly connected to the longitudinal beams 30,32 by means of a securing means 36. [ The reinforcing element 28 is in the form of a box or block and has, in one particular embodiment, a cavity into which the electrical components can be mounted. An adaptive element 42 having a flat surface 62 and a concave curved surface 64 is disposed between the electric drive machine 22 and the reinforcing element 28. [ The flat surface 62 serves to secure the adaptation element 42 to the reinforcement element 28 and the concave surface is arranged to face the electric drive machine 22 to provide the reinforcement element 28 upon impact of the vehicle 10. [ And to improve the block formation by the reinforcing element 28 and the electric drive machine 22. In this case, the concave surface 64 may be spaced from the electric drive machine 22 or may be adjacent to the electric drive machine. The adaptation element 42 preferably has a honeycomb structure and is formed of, for example, a plastic such as hard rubber or a metal such as aluminum.

With the adaptation element 42, the block formation by the reinforcing element 28 and the electric drive machine 22 can be improved overall.

3a, there is shown schematically a particular embodiment of a reinforcing element 28 or hollow body 28. In the embodiment shown in Fig. The same components are designated by the same reference numerals, and only special features are described herein.

As noted above, the reinforcing element 28 is secured to the distal ends 38 of the longitudinal beams 30,32. The reinforcing element 28 has a cavity 66 that contributes to weight reduction within which electrical components of an electric drive machine, such as a charge unit or an inverter, for charging the battery 40, for example, . In this embodiment, the reinforcing element 28 forms a mechanical connection between the two longitudinal beams 30, 32 through a solid metal housing with flexural stiffness.

Figure 3b schematically shows an alternative embodiment of the reinforcing element 28. [ The same components are designated by the same reference numerals, and only special features are described herein.

The reinforcing element 28 is generally formed of a hollow body, wherein a plurality of reinforcing struts 68 are formed in the hollow body to form a frame structure together. The reinforcement struts 68 extend in radial or V-shape in different directions within the reinforcement element 28, starting at the mounting point 70. [ The mounting point 70 forms a mechanical connection between the reinforcing element 28 and each longitudinal beam 30,32 and is assigned to one of the securing means 36. [ The mechanical stability of the reinforcing element 28 can be increased as desired by the frame structure formed of the reinforcing struts 68 in the cavity of the reinforcing element 28 and the reinforcing struts 68 Transfers the collision energy to the mounting frame 20 through the mounting points 70, and transmits and distributes the collision energy.

Claims (13)

A mounting frame (20) for an electrically powered vehicle (10) comprising two longitudinal beams (30) oriented in the longitudinal direction (18) of the motor vehicle (10) An electric drive unit 22 for driving the automobile 10 mounted on the longitudinal beams 30 and 32 and an electric drive unit 22 formed separately from the longitudinal beams 30 and 32, A mounting frame (20) for an electrically driven vehicle, comprising a bending rigid hollow body (28) fixed to a mounting frame (20)
Characterized in that the hollow body (28) is disposed between the longitudinal beams (30,32) and is mechanically fixedly connected to the longitudinal beams (30,32) to form a closed frame section Automotive mounting frame (20). A mounting frame for an electric powered car according to claim 1, characterized in that the hollow body (28) is fixed to the longitudinal beams (30, 32) by a connecting means (36). 3. A method according to claim 1 or 2, wherein the hollow body (28) and the drive unit (22) are successively mounted in the longitudinal direction (18) on the longitudinal beams (30,32) Is offset so as to be offset with respect to the drive unit (22) toward the outside in the direction (18). 3. The apparatus according to claim 1 or 2, wherein the longitudinal beams (30,32) are equipped with a battery (40) for supplying electrical energy to the drive unit (22) , And is offset from the battery (40) toward the outside. 3. A mounting frame for an electric powered car according to claim 1 or 2, characterized in that reinforcing struts (68) are formed in the hollow body (28). 6. A method according to claim 5 wherein the reinforcing struts (68) extend radially into the hollow body (28) starting from a mounting point (70) at which the hollow body (28) is mounted to one of the longitudinal beams And a mounting frame for an electric powered automobile. 3. A mounting frame for an electric powered automobile according to claim 1 or 2, characterized in that an adaptation element (42) is arranged between the hollow body (28) and the electric drive unit. 8. A mounting frame for an electric powered car according to claim 7, characterized in that the adaptation element (42) has a concave curved surface towards the drive unit (22). 8. A mounting frame for an electrically driven vehicle according to claim 7, characterized in that the adaptation element (42) is formed of plastic. 8. The mounting frame as claimed in claim 7, characterized in that the adaptation element (42) is formed of metal. 8. A mounting frame for an electrically driven vehicle according to claim 7, characterized in that the adaptation element (42) has a honeycomb structure. 3. A mounting frame for an electric powered car according to claim 1 or 2, characterized in that the electric parts of the electric powered car (10) are housed in the hollow body (28). A mounting frame for an electric powered automobile, according to claim 1 or 2, characterized in that the hollow body (28) is in the form of a closed hollow body (28).

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